For price, delivery and to place orders: Hittite Microwave Corporation, 2 Elizabeth Drive, Chelmsford, MA 01824
Phone: 978-250-3343 Fax: 978-250-3373 Order On-line at www.hittite.com
Application Support: Phone: 978-250-3343 or apps@hittite.com
ATTENUATOR - ANALOG - SMT
1
HMC712LP3C
v06.0312
GaAs MMIC VOLTAGE-VARIABLE
ATTENUATOR, 5 - 26.5 GHz
General Description
Features
Functional Diagram
Wide Bandwidth: 5 - 26.5 GHz
Excellent Linearity: +28 dBm Input P1dB
Wide Attenuation Range: 28 dB
Absorptive Topology
Singe or Dual Control Operation
16 Lead 3x3mm SMT Package: 9mm²
Electrical Specications, TA = +25° C, 50 Ohm system
Typical Applications
The HMC712LP3CE is ideal for:
• Point-to-Point Radio
• VSAT Radio
• Test Instrumentation
• Microwave Sensors
• Military, ECM & Radar
The HMC712LP3CE is an absorptive Voltage Var-
iable Attenuator (VVA) which operates from 5 - 26.5
GHz and is ideal in designs where an analog DC
control signal must be used to control RF signal
levels over a 28 dB amplitude range. It features two
shunt-type attenuators which are controlled by two
analog voltages, Vctrl1 and Vctrl2. Optimum linearity
performance of the attenuator is achieved by rst
varying Vctrl1 of the 1st attenuation stage from -3V
to 0V with Vctrl2 xed at -3V. The control voltage of
the 2nd attenuation stage, Vctrl2, should then be
varied from -3V to 0V, with Vctrl1 xed at 0V. The
HMC712LP3CE is housed in a RoHS compliant
3x3 mm QFN leadless package
However, if the Vctrl1 and Vctrl2 pins are connected
together it is possible to achieve the full analog
attenuation range with only a small degradation
in input IP3 performance. Applications include
AGC circuits and temperature compensation of
multiple gain stages in microwave point-to-point and
VSAT radios.
Parameter Min. Typ. Max. Units
Insertion Loss
5 - 16 GHz
16 - 24 GHz
24 - 26.5 GHz
3.5
4.5
5.5
dB
dB
dB
Attenuation Range 28 dB
Input Return Loss 12 dB
Output Return Loss 10 dB
Input Power for 1 dB Compression (any attenuation) 28 dBm
Input Third Order Intercept
(Two-tone Input Power = 10 dBm Each Tone) 32 dBm
For price, delivery and to place orders: Hittite Microwave Corporation, 2 Elizabeth Drive, Chelmsford, MA 01824
Phone: 978-250-3343 Fax: 978-250-3373 Order On-line at www.hittite.com
Application Support: Phone: 978-250-3343 or apps@hittite.com
ATTENUATOR - ANALOG - SMT
2
HMC712LP3C
v06.0312
GaAs MMIC VOLTAGE-VARIABLE
ATTENUATOR, 5 - 26.5 GHz
Attenuation vs. Vctrl2
Over Temperature @ 10 GHz, Vctrl1 = 0V
Attenuation vs. Frequency over Vctrl
Vctrl1 = Variable, Vctrl2 = -3V
Attenuation vs. Vctrl1
Over Temperature @ 10 GHz, Vctrl2 = -3V
Attenuation vs. Pin @ 10 GHz
Vctrl1 = Variable, Vctrl2 = -3V
Attenuation vs. Frequency over Vctrl
Vctrl1 = 0V, Vctrl2 = Variable
-50
-40
-30
-20
-10
0
2 6 10 14 18 22 26 30
-3.0 V
-1.8 V
-1.4 V
-0.8 V
0.0 V
ATTENUATION (dB)
FREQUENCY (GHz)
-15
-10
-5
0
2 6 10 14 18 22 26 30
-3.0 V
-1.6 V
-1.2 V
-0.6 V
0.0 V
ATTENUATION (dB)
FREQUENCY (GHz)
-10
-8
-6
-4
-2
0
-3 -2.5 -2 -1.5 -1 -0.5 0
+25 C
+85 C
-40 C
ATTENUATION (dB)
Vctrl1 (V)
-35
-30
-25
-20
-15
-10
-5
0
-3 -2.5 -2 -1.5 -1 -0.5 0
+25 C
+85 C
-40 C
ATTENUATION (dB)
Vctrl2 (V)
-12
-10
-8
-6
-4
-2
0
0 5 10 15 20
-3.0 V
-1.8 V
-1.4 V
-1.0 V
-0.4
0.0 V
ATTENUATION (dB)
INPUT POWER (dBm)
For price, delivery and to place orders: Hittite Microwave Corporation, 2 Elizabeth Drive, Chelmsford, MA 01824
Phone: 978-250-3343 Fax: 978-250-3373 Order On-line at www.hittite.com
Application Support: Phone: 978-250-3343 or apps@hittite.com
ATTENUATOR - ANALOG - SMT
3
HMC712LP3C
v06.0312
GaAs MMIC VOLTAGE-VARIABLE
ATTENUATOR, 5 - 26.5 GHz
Output Return Loss
Vctrl1 = 0V, Vctrl2 = Variable
Output Return Loss
Vctrl1 = Variable, Vctrl2 = -3V
Input Return Loss
Vctrl1 = 0V, Vctrl2 = Variable
-40
-30
-20
-10
0
2 6 10 14 18 22 26 30
-3.0 V
-1.4 V
0.0 V
RETURN LOSS (dB)
FREQUENCY (GHz)
-30
-20
-10
0
2 6 10 14 18 22 26 30
-3.0 V
-1.2 V
0.0 V
RETURN LOSS (dB)
FREQUENCY (GHz)
-30
-20
-10
0
2 6 10 14 18 22 26 30
-3.0 V
-1.4 V
0.0 V
RETURN LOSS (dB)
FREQUENCY (GHz)
Insertion Phase vs. Vctrl2, Vctrl1 = 0VInsertion Phase vs. Vctrl1, Vctrl2 = -3V
-180
-135
-90
-45
0
45
90
135
180
-3 -2.5 -2 -1.5 -1 -0.5 0
1 GHz
5 GHz
10 GHz
20 GHz
25 GHz
INSERTION PHASE (degrees)
VCTRL 2
-180
-135
-90
-45
0
45
90
135
180
-3 -2.5 -2 -1.5 -1 -0.5 0
1 GHz
5 GHz
10 GHz
20 GHz
25 GHz
INSERTION PHASE (degrees)
VCRTL 1
Input Return Loss
Vctrl1 = Variable, Vctrl2 = -3V
-40
-30
-20
-10
0
2 6 10 14 18 22 26 30
-3.0 V
-1.2 V
0.0 V
RETURN LOSS (dB)
FREQUENCY (GHz)
For price, delivery and to place orders: Hittite Microwave Corporation, 2 Elizabeth Drive, Chelmsford, MA 01824
Phone: 978-250-3343 Fax: 978-250-3373 Order On-line at www.hittite.com
Application Support: Phone: 978-250-3343 or apps@hittite.com
ATTENUATOR - ANALOG - SMT
4
HMC712LP3C
v06.0312
GaAs MMIC VOLTAGE-VARIABLE
ATTENUATOR, 5 - 26.5 GHz
Input IP3 vs Input Power @ 10 GHz
Vctrl1 = Variable, Vctrl2 = -3V
Input IP3 vs. Input Power Over Frequency
Vctrl1 = -2.0V, Vctrl2 = -3V (Worst Case IP3)
Input IP3 vs. Input Power Over Temperature
@ 10 GHz, Vctrl1 = -2.0V, Vctrl2 = -3V
Attenuation vs. Input Power over Vctrl
Vctrl1 = Vctrl2
Attenuation vs. Vctrl over Temperature
@ 10 GHz, Vctrl1 = Vctrl2
Attenuation vs. Frequency over Vctrl
Vctrl1 = Vctrl2
10
20
30
40
50
60
0 5 10 15 20
-3.0 V
-2.0 V
-1.6 V
-1.0 V
0.0 V
IP3 (dBm)
SINGLE TONE INPUT POWER (dBm)
20
25
30
35
40
0 5 10 15 20
5 GHz
15 GHz
20 GHz
30 GHz
IP3 (dBm)
SINGLE TONE INPUT POWER (dBm)
-40
-30
-20
-10
0
0 5 10 15 20
-3.0 V
-1.8 V
-1.4 V
-1.0 V
-0.4 V
0.0 V
ATTENUATION (dB)
INPUT POWER (dBm)
-50
-40
-30
-20
-10
0
2 9 16 23 30
-3.0 V
-1.6 V
-1.2 V
-0.6 V
0.0 V
ATTENUATION (dB)
FREQUENCY (GHz)
-40
-30
-20
-10
0
-3 -2.5 -2 -1.5 -1 -0.5 0
+25 C
+85 C
-40 C
ATTENUATION (dB)
CONTROL VOLTAGE (V)
20
25
30
35
40
0 5 10 15 20
+25 C
+85 C
-40 C
IP3 (dBm)
SINGLE TONE INPUT POWER (dBm)
For price, delivery and to place orders: Hittite Microwave Corporation, 2 Elizabeth Drive, Chelmsford, MA 01824
Phone: 978-250-3343 Fax: 978-250-3373 Order On-line at www.hittite.com
Application Support: Phone: 978-250-3343 or apps@hittite.com
ATTENUATOR - ANALOG - SMT
5
HMC712LP3C
v06.0312
GaAs MMIC VOLTAGE-VARIABLE
ATTENUATOR, 5 - 26.5 GHz
Absolute Maximum Ratings
RF Input Power +30 dBm
Control Voltage Range +1 to -5V
Channel Temperature 150 °C
Continuous Pdiss (T = 85 °C) 1W
Thermal Resistance
(Channel to ground paddle) 66 °C/W
Storage Temperature -65 to +150 °C
Operating Temperature -40 to +85 °C
ESD Sensitivity (HBM) Class 1A
ELECTROSTATIC SENSITIVE DEVICE
OBSERVE HANDLING PRECAUTIONS
Control Voltages
Vctrl1 -3 to 0V @ 10 µA
Vctrl2 -3 to 0V @ 10 µA
Input Return Loss, Vctrl1 = Vctrl2 Output Return Loss, Vctrl1 = Vctrl2
Input IP3 vs. Input Power Over
Vctrl @ 10 GHz, Vctrl1 = Vctrl2
-40
-30
-20
-10
0
2 6 10 14 18 22 26 30
-3.0 V
-1.2 V
0.0 V
RETURN LOSS (dB)
FREQUENCY (GHz)
-30
-20
-10
0
2 6 10 14 18 22 26 30
-3.0 V
-1.2 V
0.0 V
RETURN LOSS (dB)
FREQUENCY (GHz)
0
10
20
30
40
50
60
0 5 10 15 20
-3.0 V
-2.0 V
-1.6 V
-1.0 V
0.0 V
IP3 (dBm)
SINGLE TONE INPUT POWER (dBm)
For price, delivery and to place orders: Hittite Microwave Corporation, 2 Elizabeth Drive, Chelmsford, MA 01824
Phone: 978-250-3343 Fax: 978-250-3373 Order On-line at www.hittite.com
Application Support: Phone: 978-250-3343 or apps@hittite.com
ATTENUATOR - ANALOG - SMT
6
HMC712LP3C
v06.0312
GaAs MMIC VOLTAGE-VARIABLE
ATTENUATOR, 5 - 26.5 GHz
Outline Drawing
NOTES:
1. PACKAGE BODY MATERIAL: LOW STRESS INJECTION MOLDED
PLASTIC SILICA AND SILICON IMPREGNATED.
2. LEAD AND GROUND PADDLE MATERIAL: COPPER ALLOY.
3. LEAD AND GROUND PADDLE PLATING: 100% MATTE TIN.
4. DIMENSIONS ARE IN INCHES [MILLIMETERS].
5. LEAD SPACING TOLERANCE IS NON-CUMULATIVE.
6. PAD BURR LENGTH SHALL BE 0.15mm MAX.
PAD BURR HEIGHT SHALL BE 0.05mm MAX.
7. PACKAGE WARP SHALL NOT EXCEED 0.05mm
8. ALL GROUND LEADS AND GROUND PADDLE MUST BE SOLDERED
TO PCB RF GROUND.
9. REFER TO HITTITE APPLICATION NOTE FOR SUGGESTED PCB
LAND PATTERN.
Part Number Package Body Material Lead Finish MSL Rating Package Marking [1]
HMC712LP3CE RoHS-compliant Low Stress Injection Molded Plastic 100% matte Sn MSL1 [2] H712
XXXX
[1] 4-Digit lot number XXXX
[2] Max peak reow temperature of 260 °C
Package Information
For price, delivery and to place orders: Hittite Microwave Corporation, 2 Elizabeth Drive, Chelmsford, MA 01824
Phone: 978-250-3343 Fax: 978-250-3373 Order On-line at www.hittite.com
Application Support: Phone: 978-250-3343 or apps@hittite.com
ATTENUATOR - ANALOG - SMT
7
HMC712LP3C
v06.0312
GaAs MMIC VOLTAGE-VARIABLE
ATTENUATOR, 5 - 26.5 GHz
Application Circuit
Pin Number Function Description Interface Schematic
1, 2, 4, 9, 11, 12
Ground Paddle GND Ground paddle must be connected to RF/DC ground.
3RFIN
This pin is DC coupled and matched to 50 Ohms.
A blocking capacitor is required if RF line potential
is not equal to 0V.
5, 8, 13 - 16 N/C These pins should be connected to PCB RF ground to
maximize performance.
6Vctrl1 Control Voltage 1
7Vctrl2 Control Voltage 2
10 RFOUT
This pin is DC coupled and matched to 50 Ohms.
A blocking capacitor is required if RF line potential
is not equal to 0V.
Pin Descriptions
For price, delivery and to place orders: Hittite Microwave Corporation, 2 Elizabeth Drive, Chelmsford, MA 01824
Phone: 978-250-3343 Fax: 978-250-3373 Order On-line at www.hittite.com
Application Support: Phone: 978-250-3343 or apps@hittite.com
ATTENUATOR - ANALOG - SMT
8
HMC712LP3C
v06.0312
GaAs MMIC VOLTAGE-VARIABLE
ATTENUATOR, 5 - 26.5 GHz
Evaluation PCB
The circuit board used in the nal application
should use RF circuit design techniques. Signal
lines should have 50 Ohm impedance while the
package ground leads and exposed paddle should
be connected directly to the ground plane similar
to that shown. A sufficient number of via holes
should be used to connect the top and bottom
ground planes. The evaluation circuit board shown
is available from Hittite upon request.
List of Materials for Evaluation PCB 123773 [1]
Item Description
J1, J2 PCB Mount SMA RF Connector
C1, C2 100 pF Capacitor, 0402 Pkg.
C3, C4 1000 pF Capacitor, 0603 Pkg.
C5, C6 4.7 µF Capacitor, Tantalum
V1, V2 DC Pin
U1 HMC712LP3CE Voltage Variable Attenuator
PCB [2] 123771 Evaluation PCB
[1] Reference this number when ordering complete evaluation PCB
[2] Circuit Board Material: Arlon 25FR or Rogers 4350